VNC: VMware VNC VMWDynResolution Heap Buffer Overflow

This signature detects attempts to exploit a known issue in VMware VNC. A remote, authenticated attacker can exploit this vulnerability by sending crafted packets to the target server. Successful exploitation will result in arbitrary code execution, whereas unsuccessful attacks may result in denial-of-service conditions.

Extended Description

VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session. Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall.

Affected Products

Vmware workstation_pro

References

CVE: CVE-2017-4933

URL: https://www.talosintelligence.com/reports/talos-2017-0368 https://www.vmware.com/security/advisories/vmsa-2017-0021.html

Short Name

VNC:VMWARE-VNC-VMWDYN-BO

Severity

Major

Recommended

True

Recommended Action

Drop

VNC: VMware VNC VMWDynResolution Heap Buffer Overflow

Extended Description

Affected Products

References

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